A colony of African cassava whitefly maintained at NRI to enable research to be carried out into the reasons behind the superabundant populations currently spreading diseases and causing significant cassava yield losses in East and Central Africa. Photo: J Colvin

Professor John Colvin and Ms Cathy Gwandu, a PhD student funded by the African Cassava Whitefly Project, collecting whitefly specimens in a cassava field in central Malawi. Photo: S Seal